a place with a lot of air pollution, imagine the los angeles smock and cigarette smoke, this is bad news. second-hand smoke is not good. >>shepard: you wonder what this leads to and you would think more regulations are on the way >>guest: i would favor more of that. if you have gruesome pictures of what the cancer looks like, we could are tougher. people are not taking the risk or assuming the danger, they are bistanders. >>shepard: and another study that is not enough, another study where experts say the warning of second-hand television in essence, they say even when kids are not sitting there glued to the television, the television could be on in the background and that is causing problems, just a tv someone else is watching. the study is from the "journal of pediatrics," finds american kids are spoked to four hour as day of background division. >>guest: this show exempt. >>shepard: among poor families it is nearly six hours a day. according to the reporting in this study it request affect we attention span and performance. >>guest: you leave the tv on in the background like radio, th